Who makes pentax 645 lenses ?

[larkis]

Does pentax have their own lens design arm or do they hire other lens manufacturers to re brand existing lenses for the pentax ? I heard that the full frame and APSC lenses are tamrons. Does anyone have more info on this ?

[alatreille]

All the older film era 645 lenses were designed by Pentax.

I couldn't confirm that the digital 645 lenses are designed by Pentax, but I'd be close to 100% sure that they are.

[TheDocAUS]

Pentax designs and makes the 645 lens.

Some new lens on the new FF 35mm are rebadged Tamron lens.

[alatreille]

Met with my local Pentax rep today.

Yes - all 645 Lenses have been designed and manufactured by Pentax/Ricoh.
He state only one 35mm lens is a Tamron.

The new Pentax 645-35mm lens is very similiar to the old lens but has been entirely rebuilt with tighter tolerances. 
He's getting me one to do a comparison. 
Should be fun!

;-)

Pentax designs and makes the 645 lens.

Some new lens on the new FF 35mm are rebadged Tamron lens.